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Vulnerability DatabaseCVE-2025-27820

CVE-2025-27820: 
Java vulnerability analysis and mitigation

Overview

CVE-2025-27820 is a security vulnerability discovered in Apache HttpClient versions 5.4.x. The vulnerability stems from a bug in PSL (Public Suffix List) validation logic that disables domain checks, affecting cookie management and host name verification. The issue was discovered by the Apache HttpClient team and was fixed in version 5.4.3 (NVD).

Technical details

The vulnerability has been assigned a CVSS v3.1 Base Score of 7.5 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. The issue is classified as CWE-295 (Improper Certificate Validation) and affects the domain validation mechanisms in Apache HttpClient 5.4.x (NVD).

Impact

The vulnerability compromises the security of domain validation checks, potentially affecting both cookie management and host name verification processes. This could lead to security bypass issues in applications using affected versions of Apache HttpClient (NVD).

Mitigation and workarounds

Users are advised to upgrade to Apache HttpClient version 5.4.3 or later, which contains the fix for this vulnerability. The fix was implemented through improvements to the PSL validation logic (Apache HttpClient).

Additional resources

Source: This report was generated using AI

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